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Noi 80,645.

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@uiten tang get-rut @Hina Letters Patent No. 80,645, dated'Aagusl 4,1868.

` IMPnoVsMENT IN'sTOVE-,GBATEs dlgrtlgehnir rrfrnfrr tu in lgrse trtters strnt mit mating part nf tigt. stmt.

rro ALL wnoM rr MAY' ooNennN:

Be it known that I, A. J. llIAGoo'mof Providence, in the county of Providence, and State 4of Rhode Island,

have invented a new and useful Improvement in Grates for Stoves and Furnaces; and I do hereby declare that the following is u full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings,'forming part of this specification.

Figure 1 represents a plan or top view of my improved grate.I

Figure 2 is a vertical longitudinal section of the same.

Figure 3 is aV vertical transverse section of the same.

Similar letters of reference indicate corresponding parts.

This invention relates to a new grate for stoves, ranges, and furnaces, which is so arranged that it can, at the same time, serve as a grate and ash-sitter. Y i

The grate is of circular form, and is at its centre, by a vertical pin, pivoted to a horizontal shaft. .On one side the grate is supported by aiixedV lug, so that it cannot be dumpedon that side. If, by suitable gearingconnection, the grate is revolved aroundits vertical axis in one direction, it will simply obtainthe said motion,

and wll'causeV the coal held on it to be thoroughly stirred and sifted, but ifrevolved in, the opposite direction.

it will not be held by the lug, and will swing around the horizontal axle and be dumped.;

A, in the drawing, represents thefre-box of a stove or furnace. In the same is arranged a horizontal spindle, B, which is Vwith both ends hung in tubular shafts, a a, which have 4their bearings in the opposite ends of the fire-box. Two such'hollow shafts zare required, only, if Ytwo circular gratos are employed, as shown. Only one is needed if one circular grate is used, as in cylindrical or small stoves. The'spindle B can turn loose in the shafts a, and the latter can turn independent of the spindle.

The end or ends of the spindle'project outside of the hollow shafts, as shown, so as to allow :a crank to be `applied to the projecting cnil of the spindle, as in fig. 2, which end is made polygonal, or otherwise suited to be grasped by the crank. The crank can also he applied to the outer end of-the shaft a, as in fig. l. Oneach hollow shaft a is mounted a bevel-pinion, b, as shown. 4

C represents `the gra-te. The same is of circular shape, as is clearly shown in fig. I, and has hevelled teeth on its under side, which mesh into the pinion b, as shown. From the centre of thegrate- C projects downward a pin, r2, which is fitted through an eye in the spindle B, and which forms the vertical axle of the grate.

e represents a stud or lug, projecting from one side of the fire-box, to support the grate, asis clearly shown indigs. land 3.. y y I l When, bymeans ofthe crank, the shaft a is 'turned in the direction of the arrow 1, fig. 3 it will, by means of the kpinion b, carry the grate aroundwit'h it in the direction of the arrow .2,.1`n iig'. 1, and will, as the grate is simply balanced on the spindle, tend to thrbwit over to that side ou which the lug c is larranged. The lug e, however, supports the grate, and the same can therefore be turned in the aforesaid direction without danger ot' itsbeing dumped. 4

When the grate is thus revolved around its vertical axis, it will be an excellent ashesifter, 'as bythe rotary motion all the coal and-ashes resting on the grate will be stirrcd, and the ashes will be caused to fall through, while the coal will remain on the'grate.

If Vthe shaft a, however, isi-turned in the opposite direction, so as torevolve the grate in a direction opposite to that indicated by the arrows 2, the friction of the gearing will carry thegrate away from the supporte, and will cause the same to lose its balance, and t turn over, as shown by red lines in lig. 3, and to thus dump the coal. `:Byputting the crank directly on the spindle, the grate may bet dumped without reference to the gearing.

The grate can bc brought` up again either by directly turning the spindle or by the friction of the gears, if the shaft a is turned in the direction of the'arrow 1.

If one grate is used, the aforesaid description will be correct; but if two gratos arcjitted into the same spindle B, as in gs. 1 and 2, there must be a. seperate shaft, a, pinion b, and support e, for each grate, so that each grate may be sifted separately, while they can only be dumped simultaneously.

I claim es new, and desire to secure by Letters Patent-$- y The combination and arrangement of the revolving grates C C, horizontal shaft B, lugs e e, tubular shafts a a, and bevelled pinions b b, all operating as described, whereby the grates are revolved separately and dumped simultaneously, asset forth and shown'.

The above specification of my invention signed by me, this' 27th day of March, 1868.

A. J. MAGOON. Witnesses:

WM. F. MeNAMAnA, A F. RoBERTs. 

